KR880022861U - 키폰(key phone)의 자동 다이얼링회로 - Google Patents
키폰(key phone)의 자동 다이얼링회로Info
- Publication number
- KR880022861U KR880022861U KR2019870006594U KR870006594U KR880022861U KR 880022861 U KR880022861 U KR 880022861U KR 2019870006594 U KR2019870006594 U KR 2019870006594U KR 870006594 U KR870006594 U KR 870006594U KR 880022861 U KR880022861 U KR 880022861U
- Authority
- KR
- South Korea
- Prior art keywords
- automatic dialing
- key phone
- dialing circuit
- circuit
- phone
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/26—Devices for calling a subscriber
- H04M1/30—Devices which can set up and transmit only one digit at a time
- H04M1/50—Devices which can set up and transmit only one digit at a time by generating or selecting currents of predetermined frequencies or combinations of frequencies
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Devices For Supply Of Signal Current (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR2019870006594U KR900002475Y1 (ko) | 1987-05-01 | 1987-05-01 | 키폰(key phone)의 자동 다이얼링회로 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR2019870006594U KR900002475Y1 (ko) | 1987-05-01 | 1987-05-01 | 키폰(key phone)의 자동 다이얼링회로 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR880022861U true KR880022861U (ko) | 1988-12-27 |
KR900002475Y1 KR900002475Y1 (ko) | 1990-03-26 |
Family
ID=19262416
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR2019870006594U KR900002475Y1 (ko) | 1987-05-01 | 1987-05-01 | 키폰(key phone)의 자동 다이얼링회로 |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR900002475Y1 (ko) |
-
1987
- 1987-05-01 KR KR2019870006594U patent/KR900002475Y1/ko not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
KR900002475Y1 (ko) | 1990-03-26 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
A201 | Request for examination | ||
E701 | Decision to grant or registration of patent right | ||
REGI | Registration of establishment | ||
FPAY | Annual fee payment |
Payment date: 19940311 Year of fee payment: 5 |
|
LAPS | Lapse due to unpaid annual fee |